Great question........here is my belief, although I am no expert on rods. My feeling is that the action is a combination of the material(type and thickness) and the taper. In the times I have sent rods back because they where broken, I have never seen or felt a difference in the action. I would suspect that they should be able to match the action and everything else preety darn close to exact........

Does anyone have some knowledge about the rod design and construction to respond ???